Subterror Behemoth - Hard Control / Stun

My most solid deck I built with help of AI and tested it with hand draws and meta bot games. Runs really well.

Lord of The Heavenly Prison apparently is Grade A in my Deck. You can use it at the start of each of your turns and your Face-down cards are indestructible for as much as you want. Or you can trade that destruction immunity for a 3000 ATK / 3000 DEF beater.

I wanted more disruption so I started using Super Polymerization. I've read in meta games it's Grade A. I have 10 targets even 1 general that says 3 monsters with different names for general cases.

Pro Tip: If you have Subterror Guru face-down and he gets attacked but you don't have Hidden City you can help him with Final Battle. Press Chain On before the attack and wait for Guru to flip up which is the Battle Step "Before Damage Calculation" then you can buff his defense with Final Battle because he will be face-up. Lord of The Heavenly Prison protects Final Battle so it won't be so easy for opponent to get rid of it.

Tip: You get Thunder Dragon out with Voltelluric. You can buff him with Terrors in the Hidden City to make him 4100 ATK 4000 DEF(other cards can set him down forcefully so you can flip him up). Will be a lot harder to get rid of and meanwhile your opponent can't search cards from Deck

Tip: Flip Enemy Monsters facedown with Ultramafus then pop them with Stygokraken. They can't protect themselves with Anti-Destruction or Anti-Targeting effects when they are Face-down. They also aren't immune to Ultramafus Flip-down as it's neither targeting nor destruction.

Tip: Pop Enemy backrow with Stygokraken. Use Final Battle beforehand so they don't negate it